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Table 6 Influence of baseline mental health on attendance at study follow-up visits: Results are presented from unadjusted and mutually adjusted logistic regression models. Mutually adjusted models are adjusted for baseline mental health variables that were statistically significant in unadjusted models. Baseline mental health variables that were not statistically significant in unadjusted models were not adjusted for in mutually adjusted models. All models were controlled for randomised group and clustering by general practice

From: The impact of participant mental health on attendance and engagement in a trial of behavioural weight management programmes: secondary analysis of the WRAP randomised controlled trial

Mental health at baseline: Attendance at 3-month study visit (Odds ratio (95% CI))
Unadjusted logistic regression (n = 1209) Mutually adjusted logistic regression (n = 1196)
Global quality of life 1.95 (1.20, 3.17) 1.25 (0.67, 2.30)
Satisfaction with life 1.02 (1.00, 1.04) 0.99 (0.97, 1.02)
Anxiety 0.95 (0.92, 0.98) 0.99 (0.94, 1.04)
Depression 0.93 (0.89, 0.97) 0.94 (0.87, 1.01)
Mental health at baseline: Attendance at 12-month study visit (Odds ratio (95% CI))
Unadjusted logistic regression (n = 1227) Mutually adjusted logistic regression (n = 1224)
Global quality of life 1.48 (0.93, 2.37) ^^
Satisfaction with life 1.02 (1.00, 1.04) 1.01 (0.98, 1.03)
Anxiety 0.94 (0.91, 0.97) 0.96 (0.92, 1.00)
Depression 0.94 (0.91, 0.98) 0.97 (0.93, 1.02)
Mental health at baseline: Attendance at 24-month study visit (Odds ratio (95% CI))
Unadjusted logistic regression (n = 1237) Mutually adjusted logistic regression (n = 1224)
Global quality of life 1.61 (0.97, 2.66) ^^
Satisfaction with life 1.03 (1.00, 1.05) 1.01 (0.99, 1.04)
Anxiety 0.94 (0.91, 0.97) 0.95 (0.91, 0.98)
Depression 0.95 (0.91, 1.00) 1.00 (0.95, 1.06)
Mental health at baseline: Attendance at 60-month study visit (Odds ratio (95% CI))
Unadjusted logistic regression (n = 1237) Mutually adjusted logistic regression (n = 1196)
Global quality of life 2.02 (1.27, 3.23) 1.41 (0.83, 2.38)
Satisfaction with life 1.03 (1.00, 1.05) 1.01 (0.98, 1.04)
Anxiety 0.95 (0.92, 0.98) 0.98 (0.95, 1.02)
Depression 0.94 (0.91, 0.97) 0.97 (0.92, 1.03)
  1. Note: ^^ Not included in mutually adjusted model
  2. Abbreviations: CI Confidence interval